have also a look at ?is.ordered, it may be more useful than my previous mail. florence.
On 11/25/05, John Logsdon <[EMAIL PROTECTED]> wrote: > > I have an ordering and factor problem to which there must be a simple > solution! The version is R 2.0.1 (2004-11-15) on A Linux platform. > > A data frame H is read in from a .csv file using read.csv with as.is=TRUE. > > Another data frame HN is constructed from data and I want to compare two > columns both named ss of the (sorted) data frames that are the same > length. > > The problem is that HN$ss is always treated as a factor whatever I do > while H$ss is treated as an integer, which is what I want. Somewhere R is > making an implicit transformation but I can't see how to correct it. > > The data are all integers in the range 1:13 - in fact with no gaps. If I > tabulate from H: > > > table(H$ss) > > 1 2 3 4 5 6 7 8 9 10 11 12 13 > 176 176 176 176 176 176 341 8726 8784 8777 8773 8749 8747 > > and for HN: > > > table(HN$ss) > > 1 10 11 12 13 2 3 4 5 6 7 8 9 > 176 8777 8773 8749 8747 176 176 176 176 176 341 8726 8784 > > At some time while constructing HN, I have to make it a character matrix - > otherwise gsub doesn't work when removing surplus blanks for example - but > I have turned it back into a data frame in the end. > > If I check the modes, both data frames are lists and both columns are > numeric - HN is not reported as a factor. Yet it appears to be treated as > a factor, for example: > > > table(formatC(H$ss,dig=0,width=2,format="f",flag="0")) > > 01 02 03 04 05 06 07 08 09 10 11 12 13 > 176 176 176 176 176 176 341 8726 8784 8777 8773 8749 8747 > > table(formatC(HN$ss,dig=0,width=2,format="f",flag="0")) > > yet: > > 1 10 11 12 13 2 3 4 5 6 7 8 9 > 176 8777 8773 8749 8747 176 176 176 176 176 341 8726 8784 > Warning messages: > 1: "+" not meaningful for factors in: Ops.factor(x, ifelse(x == 0, 1, 0)) > 2: "<" not meaningful for factors in: Ops.factor(x, 0) > > I have tried as.numeric but then I get the factor level rather than name > returned: > > > table(formatC(as.numeric(HN$ss),dig=0,width=2,format="f",flag="0")) > > 01 02 03 04 05 06 07 08 09 10 11 12 13 > 176 8777 8773 8749 8747 176 176 176 176 176 341 8726 8784 > > which obviously is a tabulation of the internal levels rather than the > data. > > TIA > > John > > John Logsdon "Try to make things as simple > Quantex Research Ltd, Manchester UK as possible but not simpler" > [EMAIL PROTECTED] [EMAIL PROTECTED] > +44(0)161 445 4951/G:+44(0)7717758675 www.quantex-research.com > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
